> On Linux, to clear large regions of memory, the best way seems
> to be madvise(MADV_DONTNEED). Indeed, the previous trick of
> reading /dev/zero does not seem to have the correct effect of
> lazily-allocating pages on all Linux systems (e.g. bigdog-vm1).
> Note that this usage of madvise() is purely Linux-specific.
>
Note that bigdogvm1 is a vm, it might behave differently...